Wet Scrubber

Wet Scrubbers: A Wet Scrubber System uses either water or other liquid solutions to scrub particulate matter and harmful gases from the gas stream. A Wet scrubber captures the particles in fine liquid mist droplets or in layers of scrubbing liquid and then separates the liquid droplets from the gas stream.
Dry Scrubbers: Dry Scrubbers use a dry reagent or slurry which is injected into the dirty exhaust stream of gases to neutralize or eliminate gaseous components.

Selecting the right solution:
Various process variables affect the performance of scrubber systems and particle removal namely, particle size distribution, size of liquid mist droplets, and the relative velocity between the particles and liquid mist droplets. The most important parameter is the particle size of the inlet dust content. The larger particles are easier to collect as compared to the finer ones. The key factor for effective particle removal in a wet scrubber is to create a mist of tiny liquid droplets which act as collection surfaces. Higher scrubbing efficiency for finer particles can be expected when scrubbing liquid is with the finer mist droplets and more densely available.

Efficiency of scrubber depends upon the following major parameters:

• Formation of mist of tiny droplets
• Resistance produced due to pressure drop creation
• Selection of suitable scrubbing liquid for gaseous pollutants
• Relative velocities between dust particles & liquid droplets
• Uniform mixing between gas molecules and liquid phase
• Treatment and reaction time between liquid droplets and gas molecule
• Selection of appropriate liquid to gas ratio